CATALOGUE. 351 Paemelia conspeesa, (Ehrh.) Ach., var. molliuscula, Tuckerm.—Earth, South Park, Colorado. Umbilicaeia vellea, (L.) NyL, probably, but all the specimens areinfertile.—On rocks. Twin Lakes, Colorado. Peltigeea venosa, (L.) Hoffm.—On earth, Twin Lakes. Peltigeea aphthosa, (L.) Hoffm.—Earth, Twin Lakes. Peltigeea hoeizontalis, (L.) Hoffm.—Earth, Twin Lakes. Peltigeea canina, (L.) Hoffm.—Earth, Twin Lakes. SoLOEiNA SACCATA, (L.) Ach., var. SPONGIOSA, NyL (S. bispora.)—TroutCreek and South Park, on the earth. Pannaeia Hypnoeum, (Hoff.) Koerb.—Earth, Twin Lakes, Colorado. Pannaeia beunnea, (Sw.) Mass.—Earth, Twin Lakes. Leptogium Teemelloides, (L. fil.) Fr.—On rocks. Twin Lakes. Placodium vitellinum, (Ehrh.) Naeg. & Hepp.—On the earth, Colo¬rado. Placodium sinapispeemum, (DC.) Hepp.—Earth, Twin Lakes. Placodium Jungeemanni.^;, (Vahl, Th. Fr.).—Earth, Twin Lakes. Lecanoea eubina, (Vill.) Schser.—Rocks, Twin Lakes, Colorado, andArizona. Lecanoea castanea, (Hepp.).—Earth, Twin Lakes. RiNODiNA TUEFACEA, (Wahl ) Koerb.—Earth, Twin Lakes. Cladonia fimbeiata, (L.) Fr.—Earth, Twin Lakes. Cladonia caeiosa, (Ach.) Floerk.—Earth, Twin Lakes. Cladonia geacilis, (L.) Fr., var. hybeida, Schser.—Earth, NorthBranch of South Platte. BiATOEiA CEENATA, (Tayl.) Tuckerm.—Earth, mountains of Arizona. Buellia papillata, (Sommer f) Tuckerm.—Earth, Twin Lakes,Colorado.